fn(&d); //pass the address of the beginning of the vector d to the function f
void fn(void *ptr) //accept an address of an unknown type
MyParam*p = static_cast<MyParam*>(ptr); //take the unknown type and force it to be a MyParam called p

My only question is why create a
MyParam*p
instead of a MyParam p ?

(Then you are using the -> operator since it is a MyParam*, but could you have cast to a MyParam and used . instead?)

I have a 2d matrix with dimension (3, n) called A, I want to calculate the normalization and cross product of two arrays (b,z) (see the code please) for each column (for the first column, then the second one and so on).
the function that I created to find the ...

Write a C program that should create a 10 element array of random integers (0 to 9). The program should total all of the numbers in the odd positions of the array and compare them with the total of the numbers in the even positions of the array and indicate ...